Ore-was



H. G. BLASDEL.

ORE WASHER.

N0. 397,581. Patented Feb. 12, 1889.v

1TB STATES FETCH.)

arnr ORE-WASH ER.

' SPECIFICATION forming part of Letters Patent No. 397,58L'datedFebruary 12, 1889.

Application filed September 10, 1887. Serial No. 249,400. (No model.)

To all 217mm it may concern.- 4

.30 it known that HENRY (l. lhasmdlymf the city and county of Sanlfli'tllelsfit), State of alifiirnia, have invented an lmprovennmt inOre-(1mcentrators; and I do l'u -reby de elare the following to be afull, clear, and exact description of the same.

My invention relates to that class of oreconeentrators in which anendless traveling belt mounted at an inclination is employed, and uponthe surface of which the (ire-pulp and water are fed, whereby thelighter and wtjirthlcss particles of the ore are washed down theincline, while the heavier and precious particlessueh as sul ihurets andfree goldare carried up by the belt, clinging to its surface, and arewashed oft in a tankbelow; and my in vention consists in an endlesstraveling belt having its working-snrfaceformed ot' eorru gated orriltled portions alternating with plane or smooth portions, as 1 shallhertdnafter fully describe.

The object of my invention istoprovide for this class of concentrators abelt ca mble of doing more and. better work than the ordi narysnioothsurfaced belts, or a belt complctcl y corrugated or rit'tled.

Referring to the accompanying drawings for a more complete explanationof my invention, Figure 1. is a perspective view. Fig. 2 is alongitudinal section of the belt. Fig. 3 a plan of same.

In order to fully understand the application and operation of my belt, lhave herein shown it in connection with the essential parts of theordinary machines of this class, A l'ieing the main frame of themachine, and 1'3 the belt frame having the drivirig-roller b at the topand the guide-rollers b at the bottom, and C being the water and pulpdistrilniting apparatus generally.

D is the endless belt which passes over the rollers 19 and b.

It is usual in this class of machines to use a plane-surfacetl belt,though in some instances belts having a completely corrugated or rifliedsurface have been attempted. In-

stead of using either of these classes of belts, I make my belt with aseries of corrugated l or rit'tlcd portions, (7, and plane or smoothportions (1" intervening, these alternating l throughmit the entireworking-s11rface of the belt. The eorrugationsor ritiics extend transversely of the belt, and may be either de pressed or elevated, asdesired, being in pracl lice, say, about one-sixteenth of an inch in ldepth and width, each series or set of corru- 1 gations or ,riltlcsbeing about three inches 1 wide. The plane surface between. the series lof corrugations I'usually make about six inch es wide, these dimensionsbeing only approximate, as I do not confine myself to them. By thisconstruction of the surface of the belt j the material acquires acertain velocity of movement over the smooth or plane surfaces duringwhich time the heavier precious parti eles and sulphurets have anopportunity to settle to a lower plane of the passing current, so thatupon meeting with the corrugations they are more easily caught and ingreater quantities, wherefore thebelt is more effective than if itswhole surface were corrugated or riltled, or if the whole surface weresmooth.

This belt can be made to run faster, and can also be set at a greaterinclination than any smooth belt could possibly be.

Having thus described myinveution, what I claim as new, and desire tosecure by illetters Patent, is

1. As a new article of manufacture, a belt the entire surface of whichis divided into zones or strips of alternate corrugated orrifsubstantially as herein described.

2. In an ore-concent-rater, and in combination with the be]t-supportingframe and its drumsover-which the belt passes, and the water and pulpdistrilniting apparatus, an endless traveling bclt having its entireworkingsurt'ace divided into zones of alternate corrugated or rittledportions and plane or smooth portions, substantially as hereindescribed.

In witness whereof I have hereunto set my hand.

HENRY G. BLASDEL.

Vitn esses:

S. H. NoURsE, H. 0. LEE.

tied portions and plane or smooth portions,

